RT Conference Proceedings
T1 Frequency selective signal extrapolation for compensation of missing data in sinograms
A1 López Herraiz, Joaquín
A1 España, Samuel
A1 Vicente, Esther
A1 Herranz, Elena
A1 Desco Menéndez, Manuel
A1 Vaquero López, Juan José
A1 Udías, José Manuel
AB We present a method to compensate for missingprojection data in positron emission tomography (PET), which may result from gaps between adjacent detectors or frommalfunctioning detectors. To prevent artifacts in the reconstruction when using Fourier rebinning (FORE) or analytical reconstruction algorithms, filling the data gaps is required. This new approach for sinogram data interpolation prior to reconstruction is based on a simple iterative freq uency selective signal extrapolation method initially proposed and successfully applied for error concealment in image and video communication. In this work the method has been improved taking advantage of well known restrictions in the allowed region of frequencies of the sinograms.We compare quantitatively the results of this technique with previously proposed gap filling procedures in both the sinograms and in their reconstructed images. The proposed technique outperforms those methods without requiring too much computational time.
PB IEEE
SN 978-1-4244-2714-7
SN 1082-3654
YR 2008
FD 2008-10
LK https://hdl.handle.net/10016/12216
UL https://hdl.handle.net/10016/12216
LA eng
NO Proceeding of: 2008 IEEE Nuclear Science Symposium Conference Record (NSS '08), Dresden, Germany, 19-25 Oct. 2008
NO This work was supported in part by the MEC (FPA2007-07393), CDTEAM (CENIT-Ingenio 2010) Ministerio de Industria, Spain, CPAN (Consolider-Ingenio 2010) CSPD-2007-00042 projects, and the RECAVA-RETIC network. Vicente acknowledges support from a CSIC-JAE predoctoral fellowship.
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RD 1 may. 2024